CN104941574B - A kind of inorganic ions modified zeolite composite and its application - Google Patents
A kind of inorganic ions modified zeolite composite and its application Download PDFInfo
- Publication number
- CN104941574B CN104941574B CN201510295173.5A CN201510295173A CN104941574B CN 104941574 B CN104941574 B CN 104941574B CN 201510295173 A CN201510295173 A CN 201510295173A CN 104941574 B CN104941574 B CN 104941574B
- Authority
- CN
- China
- Prior art keywords
- solution
- zeolite
- inorganic ions
- composite
- modified zeolite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The present invention discloses a kind of inorganic ions modified zeolite composite and its application, and its preparation method is as follows：（a）Configuration contains MgCl2、AlCl3And FeCl3Solution A, contain NaOH and Na2CO3B solution, and zeolite suspension；（b）Solution A and B solution are instilled into isometric zeolite suspension simultaneously；（c）Filtered after being stirred solution 1h, alternately washing and filtering filtrate, until no longer containing Cl in filtrate‑（d）Calcination in Muffle furnace is moved to after taking filtration cakes torrefaction, that is, obtains the composite；The inorganic ions modified zeolite composite can be applied in sewage disposal the effect for reaching synchronous denitrification dephosphorizing, the effective NH removed in sewage4 +‑N、NO3 ‑N and TP.
Description
Technical field
The invention belongs to environmental chemical engineering technical field, particularly a kind of inorganic ions modified zeolite composite mixing and its
Using.
Background technology
Body eutrophication (eutrophication) refers to delay because the elements such as substantial amounts of nitrogen, phosphorus, potassium are drained into flow velocity
Slowly, the surface water body of update cycle length, makes the aquatiles such as algae growth and breeding in large quantities, makes speed caused by organic matter much
More than depletion rate, organic matter is put aside in water body, destroys the process of aquatic ecological balance；The water transparency drop of eutrophication
Low, sunlight is difficult to penetrate water layer, influences aquatic plant photosynthesis, causes the hypersaturated state of dissolved oxygen, causes fish a large amount of
Death, while the water bloom such as water surface blue-green algae, green alga, wawter bloom is formed, a large amount of nitrate and nitrous acid caused by it
Salt, endanger the mankind and apply water security.
Generally believe that industrial tail water and municipal sewage plant's draining are to cause to receive N, P of body eutrophication at present
Main source, China implemented from 1 day July in 2003《Urban wastewater treatment firm pollutant emission standard》（GB18918-2002）
After country-level A standards, new requirement is proposed to urban wastewater treatment firm ammonia nitrogen, total nitrogen and total phosphorus（NH4 +-N<8mg/l、TN<
15mg/l、TP<0.5mg/l）, it is strict to control N, P content in water outlet；Domestic city sewage is generally using techniques such as A/A/O at present
Treating Municipal Sewage, but the problems such as carbon source, sludge age, nitrate in existing process be present, make existing traditional denitrification dephosphorization technique
Bad to the removal efficiency of nitrogen, phosphorus, water outlet is difficult to stably reach《Urban wastewater treatment firm pollutant emission standard》
(GB18918-2002) one-level A standards, nitrogen, the content of phosphorus are still higher in water outlet.Simply, municipal sewage life is effectively removed
Change secondary effluent turns into a urgent problem to be solved.
Houghite is a kind of two-dimensional nano anionic clay, and it forms formula and is represented by：
[M1-x 2+Mx 3+(OH)2]X+(An-)x/n·mH2O, wherein M2+Refer to divalent metal, M3+Refer to trivalent metal sun from
Son, An-- n valency the anion that can be stabilized for interlayer, n are anion valence mumber, and x is M in every mole of houghite3+Mole
Number（0.20<x<0.33）, m is the molal quantity of every mole of houghite interlayer crystallization water；With hydrotalcite layered structure, because of its piece
Layer element composition and charge density is adjustable, interlayer guest molecule, crystalline size are controllable, and the advantages such as bio-toxicity is low.Exist
The numerous areas such as organic catalysis, polymeric additive, biological medicine and environmental protection present good application prospect, especially
It is, because of laminate upper part M2+And M3+Substitute and produce superfluous positive charge, interlayer anion object can be attracted to balance,
Other anionic guest molecules can be inserted by way of ion exchange, therefore houghite is gone to anionic species absorption
Except aspect possesses congenital removal advantage, but to cation without obvious adsorption effect.According to《The preparation of houghite and its in water
The removal research of nitrate》（Xu Pan etc., South China Science ＆ Engineering University .2013）One text report Mg/Fe houghites are 8 in room temperature and PH
Under conditions of, in NO3-N（Nitrate nitrogen）Initial concentration be 100mg/l in the case of to NO3 —- N removal efficiency can reach
96%, but to the NO of low concentration3 -- N articles without reference to；Also pertinent literature reports Mg/Al houghites to initial phosphoric acid
The removal efficiency reachable 90% that ion concentration is 10mg/l, the phosphate anion experiment for lower concentration have no report
[Akihiro Shimamura, Mark I. Jones, Anionic surfactant enhanced phosphate
desorption from Mg/Al-layered double hydroxides by micelle formation. Journal
Of Colloid and Interface Science.2013,411:1-7].It can be seen that houghite is to certain density nitre state
Nitrogen and phosphate anion have good removal effect, but houghite digestion time in preparation process is longer, are being aged
Later it should not be separated in washing process, constrain the development of houghite.
Zeolite because having larger ion-exchange performance and absorption property, and be widely used in colourity in water, nitrogen,
The removal of the heavy metal ion such as phosphorus, fluorine, arsenic, wherein the most obvious to the removal effect of ammonia nitrogen, ZHU Wen-Ling et al. compare
The adsorption effect of zeolite, haydite, vermiculite, rice soil, laterite and peat to ammonia nitrogen, the results showed that absorption effect of the zeolite to ammonia nitrogen
Fruit is optimal, wherein when ammonia nitrogen initial concentration is 1500mg/l, 97.1% is can reach to the removal efficiency of ammonia nitrogen；When ammonia nitrogen is initial
The clearance of ammonia nitrogen drops to 72.0% when concentration is 100mg/l, but the document does not make a search to the ammonia nitrogen removal frank of low concentration
[ZHU Wen-Ling, CUI Li-Hua, Kinetic Adsorption of Ammonium Nitrogen by
Substrate Materials for Constructed Wetlands. Pedosphere 21(4): 454–463,
2011]；Research shows that zeolite does not have obvious removal efficiency to anion nitrate nitrogen and phosphate anion, and some change on zeolite
The method of property is reported, and Yang Shujia et al. passes through NaOH solution and MgCl2Solution modification zeolite, to NH4 +-N（Ammonia nitrogen）、PO4 3-Have
Preferable removal efficiency, but the research is relatively low to the utilization rate of modified zeolite, and to NO3 -- N does not have removal efficiency [the refined good of poplar
Magnesium-modified zeolite synchronously removes research [D] the University Of Shanxi .2013 of ammonia nitrogen and phosphorus in water removal].At present, by inorganic ions class neatly
Stone is loaded on zeolite, to integrate zeolite and hydrotalcite-like compound and functionality advantage, reaches the effect of synchronous denitrification dephosphorizing, not yet
Appear in the newspapers.
The content of the invention
For current houghite preparation time length and there is no removal efficiency to cation ammonia nitrogen, and zeolite is to cation ammonia
Nitrogen has preferable removal effect, and the present invention provides a kind of inorganic ions modified zeolite composite, and the material is coprecipitated by PH
The method that shallow lake method loads to houghite zeolite surface obtains, and is provided simultaneously with inorganic ions Mg/Al/Fe houghites and zeolite
Performance advantage, can effectively remove N in municipal sewage, P element, what the present invention was realized in：
A kind of inorganic ions modified zeolite composite, the composite are prepared by the following：
（a）Solution A is configured, containing concentration is respectively 0.75mol/L, 0.225mol/L, 0.025mol/ in the solution A
L MgCl2、AlCl3And FeCl3；
B solution is configured, is respectively 2mol/L and 0.5mol/L NaOH and Na containing concentration in the B solution2CO3；
Configuration concentration is 50g/L zeolite suspension；
（b）Zeolite suspension is stirred with 120rpm speed, while solution A and B solution are instilled into zeolite suspension, drop
Rate of acceleration is 10-15ml/min, and holding pH is 9-10, and mixed solution is obtained after titration；
The volume all same of added solution A, B solution and zeolite suspension；
（c）60 DEG C, the mixed solution 1h obtained with 60rpm speed whipping step b, then filter, separate filter cake and filter
Liquid；Filter cake is washed with distilled water or deionized water, is filtered again, so alternately washs and filters, until no longer containing in filtrate
Cl-；
（d）Filter cake, 105 DEG C of dry 12h, is then transferred in Muffle furnace, 300 by the filter cake that collection step c filterings obtain
DEG C calcination 6h, ground after firing product cooling, that is, obtain the inorganic ions modified zeolite composite.
Further, in the present invention, zeolite suspension is obtained by described in step a：Artificial zeolite is ground to particle diameter
For 60-80 mesh, distilled water or deionized water are then added, is configured to the zeolite suspension that concentration is 50g/L.
Further, in the present invention, grinding described in step d refers to that it is 60-80 mesh that firing product is ground into particle diameter.
Application of the inorganic ions modified zeolite composite of the present invention in sewage disposal.
Further, the application of the present invention in sewage disposal refers to：By inorganic ions modified zeolite composite with
In 2.5g/L dosage input sewage, to remove the N and P in sewage.
The present invention by inorganic ions Mg/Al/Fe houghites by coprecipitation by being attached to zeolite surface, to zeolite
Be modified, both improved inorganic ions Mg/Al/Fe houghites preparation process digestion time it is longer the shortcomings that, shorten
The digestion time of inorganic ions Mg/Al/Fe houghites, zeolite and hydrotalcite-like compound and the advantage of function are combined again, is reached
To the effect of synchronous denitrification dephosphorizing, NH in sewage can be effectively removed4 +-N（Ammonia nitrogen）、NO3-N（Nitrate nitrogen）And TP（Always
Phosphorus）, its removal effect respectively reached 81%, 40% and 90%.
Brief description of the drawings
Fig. 1 is influence curve figure of the different dosage composites to ammonia nitrogen removal effect；
Fig. 2 is influence curve figure of the different dosage composites to nitrate nitrogen removal effect；
Fig. 3 is influence curve figure of the different dosage composites to total phosphorus removal effect；
Fig. 4 is influence curve figure of the different dosage artificial zeolites to ammonia nitrogen removal effect；
Fig. 5 is influence curve figure of the different dosage artificial zeolites to nitrate nitrogen removal effect；
Fig. 6 is not the influence curve figure with dosage artificial zeolite to total phosphorus removal effect.
Embodiment
Embodiment 1 prepares inorganic ions modified zeolite composite
（1）MgCl is added into deionized water2、AlCl3And FeCl3, solution A is configured to, wherein, MgCl2Concentration is
0.75mol/l, AlCl3Concentration is 0.225mol/l, FeCl3Concentration is 0.025mol/l；
（2）NaOH and Na is added into deionized water2CO3B solution is configured to, wherein, NaOH concentration 2mol/l,
Na2CO3Concentration is 0.5mol/l；
（3）Artificial zeolite is taken, it is 60-80 mesh powders to be ground to particle diameter, and it is 50g/l zeolite suspension to be configured to concentration,
（In specific operation process, natural zeolite can also be used）；
（4）Inorganic ions houghite is loaded to by zeolite surface with PH coprecipitations, specific practice is as follows：Take A molten
Liquid, B solution and each 200mL of zeolite solution, zeolite suspension is stirred with 120rpm speed, instills then while thereto A
Solution and B solution, obtain mixed solution；Drop rate is 10-15ml/min, during dropwise addition, keep pH scopes 9-10 it
Between.
（5）After titration, at a temperature of 60 DEG C, solution 1h is stirred with 60rpm speed, then filtered, point
From filter cake and filtrate, filter cake is washed with distilled water or deionized water, is filtered again, so alternately washed and filter, until filtrate
In no longer contain Cl-。
（6）Filter cake is transferred in crucible, 105 DEG C of dry 12h in drying box is placed in, is then transferred into 300 DEG C of Muffle furnaces
Middle calcination 6h, after firing product cools down, it is placed in mortar to be fully ground and is sieved again with 60-80 eye mesh screens, obtain inorganic ions
Modified zeolite composite.
The synthetic municipal wastewater secondary effluent treatment effect of embodiment 2 is tested
Simulate waste water：Using the configuration of synthetic municipal wastewater biochemistry secondary effluent, specifically, ammonia nitrogen, nitrate nitrogen, total
The configuration concentration of phosphorus is respectively 8mg/l, 12mg/l, 1mg/l；
Test procedure：
（1）Experimental group：Weigh respectively embodiment 1 acquisition inorganic ions modified zeolite composite 0.1g, 0.2g,
0.3g, 0.4g, 0.5g are added in the conical flask equipped with 200ml simulation sewage, are sealed with masking foil；
（2）Control group：Artificial zeolite 0.1g, 0.2g, 0.3g, 0.4g, the 0.5g for weighing 60-80 mesh respectively are added to and are equipped with
In the conical flask of 200ml simulation sewage, sealed with masking foil；
25 DEG C, constant temperature each group conical flask 6h under 100rpm, Na Shi reagents AAS, thymol light splitting is respectively adopted
Ammonia nitrogen, nitrate nitrogen, the concentration of total phosphorus before and after photometry, Ammonium Molybdate Spectrophotometric Method for Determination reaction, calculate ammonia nitrogen, nitrate nitrogen, total
The removal effect of phosphorus.
As a result as shown in figures 1 to 6, wherein Fig. 1-3 respectively experimental group ammonia nitrogen, nitrate nitrogen, removal effect of total phosphorus, Fig. 4-6
The respectively removal effect of control group ammonia nitrogen, nitrate nitrogen, total phosphorus, as seen from the figure, with inorganic ions modified zeolite composite
The increase of input amount, the removal effect of ammonia nitrogen, nitrate nitrogen and total phosphorus gradually increase, and in 2.5g/l, removal effect is optimal, ammonia nitrogen,
The removal effect of nitrate nitrogen and total phosphorus has respectively reached 88%, 45% and 89%；And control group reaches to the maximum clearance of ammonia nitrogen
45%, there is no clearance substantially to total phosphorus, nitrate nitrogen.
The biochemistry secondary effluent treatment effect test of 3 sewage treatment plants of embodiment
（1）Sewage source：It was derived from 2015 in Zhengzhou City head of the horse hilllock municipal sewage plant second pond and takes 1L water samples,
The concentration for determining ammonia nitrogen, nitrate nitrogen and total phosphorus in secondary clarifier effluent respectively is respectively 3.48mg/l, 1.81mg/l, 0.51mg/l；
（2）Weigh respectively embodiment 1 acquisition inorganic ions modified zeolite composite 0.1g, 0.2g, 0.3g, 0.4g,
0.5g is added in the conical flask equipped with 200ml sewage, is sealed with masking foil；
Isothermal vibration 6h at 25 DEG C, ammonia nitrogen, nitrate nitrogen, the concentration of total phosphorus before and after measure reaction, calculates its ammonia nitrogen, nitre state
The removal effect of nitrogen, total phosphorus.With the increase of inorganic ions modified zeolite confection amount, ammonia nitrogen, nitrate nitrogen and total phosphorus are gone
Except effect gradually increases, in 2.5g/l, removal effect is optimal, and the removal effect of ammonia nitrogen, nitrate nitrogen and total phosphorus respectively reaches
81%th, 40% and 90%.
Embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations, although with reference to foregoing tool
The present invention is described in detail body embodiment, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from each embodiment of the present invention and specific embodiment technical scheme
Spirit and scope.
Claims (3)
1. a kind of inorganic ions modified zeolite composite, it is characterised in that the composite is prepared by the following：
（a）Solution A is configured, containing concentration is respectively 0.75mol/L, 0.225mol/L, 0.025mol/L in the solution A
MgCl2、AlCl3And FeCl3；
B solution is configured, is respectively 2mol/L and 0.5mol/L NaOH and Na containing concentration in the B solution2CO3；
Configuration concentration is 50g/L zeolite suspension；
（b）Zeolite suspension is stirred with 120rpm speed, while instills solution A and B solution, drop rate 10- thereto
15ml/min, holding pH are 9-10, and mixed solution is obtained after titration；
The volume all same of added solution A, B solution and zeolite suspension；
（c）60 DEG C, with 60rpm speed whipping step（ b）The mixed solution 1h of acquisition, is then filtered, and separates filter cake and filter
Liquid；Filter cake is washed with distilled water or deionized water, is filtered again, so alternately washs and filters, until no longer containing in filtrate
Cl-；
（d）Collection step（ c）The filter cake obtained is filtered, 105 DEG C of dry 12h, then filter cake is transferred in Muffle furnace, 300
DEG C calcination 6h, ground after firing product cooling, that is, obtain the inorganic ions modified zeolite composite；The grinding refers to
It is 60-80 mesh that firing product is ground into particle diameter；
Wherein, step（a）What the zeolite suspension was obtained by：It is 60-80 mesh that artificial zeolite is ground into particle diameter, then
Distilled water or deionized water are added, is configured to the zeolite suspension that concentration is 50g/L.
2. application of the inorganic ions modified zeolite composite as claimed in claim 1 in sewage disposal.
3. apply according to claim 2, it is characterised in that the application in sewage disposal refers to：By inorganic ions
Modified zeolite composite is put into sewage with 2.5g/L dosage, to remove the N and P in sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295173.5A CN104941574B (en) | 2015-06-02 | 2015-06-02 | A kind of inorganic ions modified zeolite composite and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295173.5A CN104941574B (en) | 2015-06-02 | 2015-06-02 | A kind of inorganic ions modified zeolite composite and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104941574A CN104941574A (en) | 2015-09-30 |
| CN104941574B true CN104941574B (en) | 2018-04-10 |
Family
ID=54156945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510295173.5A Active CN104941574B (en) | 2015-06-02 | 2015-06-02 | A kind of inorganic ions modified zeolite composite and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104941574B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771885A (en) * | 2016-05-19 | 2016-07-20 | 中南大学 | Preparation method of modified zeolite and application of modified zeolite in arsenic-bearing waste water |
| CN105906024B (en) * | 2016-07-12 | 2019-03-01 | 河南永泽环境科技有限公司 | A kind of preparation method except ammonia dephosphorization compound drug |
| CN106362681A (en) * | 2016-09-29 | 2017-02-01 | 上海海洋大学 | Phosphorus adsorbent, and preparation method and application thereof |
| CN106811200B (en) * | 2017-01-13 | 2020-04-24 | 环保桥（湖南）生态环境修复有限公司 | Composite repairing agent for reducing arsenic content in crops in arsenic-polluted area and preparation method thereof |
| CN107129000B (en) * | 2017-07-03 | 2023-05-26 | 吉林大学 | Method for removing ammonia nitrogen in ultralow-concentration ammonia nitrogen wastewater by using artificial zeolite-cellulose acetate composite material |
| CN108676563A (en) * | 2018-06-25 | 2018-10-19 | 安徽梅兰园林景观工程有限公司 | A kind of saline alkali soil conditioner |
| CN108484337A (en) * | 2018-06-25 | 2018-09-04 | 安徽梅兰园林景观工程有限公司 | A kind of saline-alkali soil modifying agent and preparation method thereof |
| CN108587642A (en) * | 2018-06-25 | 2018-09-28 | 安徽梅兰园林景观工程有限公司 | A kind of heavy metal pollution alkaline land modifying agent using calcined phosphogypsum |
| CN110385104A (en) * | 2019-05-17 | 2019-10-29 | 北京化工大学 | A kind of modified zeolite flyash composite adsorbing material and preparation method thereof |
| PH12019050291A1 (en) * | 2019-11-20 | 2021-08-23 | Univ Of The Philippines Los Ba¤Os | Modified Nanostructured Silica Materials for Heavy Metal Removal from Contaminated Water and the Methods of Production Thereof |
| CN114534686A (en) * | 2022-03-01 | 2022-05-27 | 武汉理工大学 | Black and odorous water body and bottom mud in-situ remediation agent as well as preparation method and application thereof |
| CN114669274B (en) * | 2022-05-30 | 2022-08-23 | 农业农村部环境保护科研监测所 | Preparation method of modified zeolite material for synchronously adsorbing ammonia nitrogen and phosphate radical in sewage |
| CN115646445A (en) * | 2022-10-31 | 2023-01-31 | 西安建筑科技大学 | Preparation method of modified biochar for selectively adsorbing nitrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000557A2 (en) * | 2000-06-27 | 2002-01-03 | The Procter & Gamble Company | Water treatment compositions |
| CN102219233A (en) * | 2010-10-19 | 2011-10-19 | 华北电力大学 | Method for removing nitrogen and phosphorus in sewage by zeolite synthesized by coal ash |
| CN103464107A (en) * | 2013-09-09 | 2013-12-25 | 太原理工大学 | Preparation method of ZIFs/LDHs composite material |
-
2015
- 2015-06-02 CN CN201510295173.5A patent/CN104941574B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000557A2 (en) * | 2000-06-27 | 2002-01-03 | The Procter & Gamble Company | Water treatment compositions |
| CN102219233A (en) * | 2010-10-19 | 2011-10-19 | 华北电力大学 | Method for removing nitrogen and phosphorus in sewage by zeolite synthesized by coal ash |
| CN103464107A (en) * | 2013-09-09 | 2013-12-25 | 太原理工大学 | Preparation method of ZIFs/LDHs composite material |
Non-Patent Citations (3)
| Title |
|---|
| 人造沸石负载纳米氧化镁同步脱氮除磷的研究;杨淑佳等;《环境保护科学》;20130228;第39卷(第1期);第18-19、21页 * |
| 斜发沸石负载Mg-Al-Fe水滑石在处理含氯废水中的应用研究;张万友等;《硅酸盐通报》;20131231;第32卷(第12期);第2481-2482页 * |
| 铁镁铝三元类水滑石对磷的吸附特性研究;刘国等;《工业水处理》;20150131;第35卷(第1期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104941574A (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104941574B (en) | A kind of inorganic ions modified zeolite composite and its application | |
| Liu et al. | Removing phosphorus from aqueous solutions by using iron-modified corn straw biochar | |
| CN103894395B (en) | A kind of method that heavy-metal contaminated soil secondary is repaired | |
| CN103894407B (en) | A kind of method of restoration of soil polluted by heavy metal | |
| CN109317091B (en) | Modified sepiolite heavy metal adsorption material and preparation method thereof | |
| CN101757892B (en) | Preparation method of bagasse active carbon/ferric oxide | |
| CN110227416A (en) | A kind of preparation and its application in fluoroquinolone antibiotics removal in water of iron zinc and phosphoric acid modification sludge organism charcoal | |
| CN101343090B (en) | Lanthanide series water treatment agent and method of preparing the same | |
| CN102527347A (en) | Magnetic chitosan/cationic surface active agent modified zeolite adsorbent and preparation method and application thereof | |
| AU2018437459B2 (en) | Struvite and extracting method therefor | |
| CN104707560A (en) | Preparation method of modified mesopore TiO2 capable of effectively removing phosphorus in wastewater | |
| CN102718295B (en) | Compound medicament for treating coking wastewater and preparation method thereof | |
| CN112237899A (en) | Lanthanum-magnesium modified sepiolite for removing phosphorus from black and odorous water body | |
| CN109206148A (en) | A kind of preparation method and applications of haydite | |
| CN107417058A (en) | A kind of river embankment bed mud is modified the method and its application for preparing ecology filler | |
| CN100564293C (en) | Strengthen the method for removing phosphorus in the anaerobically digested sludge liquid phase | |
| CN112675810A (en) | Amorphous high-efficiency phosphorus removal adsorption material, preparation method and water treatment application thereof | |
| CN106732469A (en) | A kind of preparation method of magnetic absorption dephosphorization agent and its renovation process of product | |
| CN107265582A (en) | A kind of compound shellfish modification biological dephosphorization material and its preparation method and application | |
| CN103480324B (en) | A kind of mesoporous Fe 3o 4microballoon and methods for making and using same thereof | |
| JP5713735B2 (en) | Phosphorus adsorbent and soil conditioner or fertilizer using the same | |
| CN108502996A (en) | A kind of ecological flocculant of quick processing cyanobacteria water body and preparation method thereof and processing method | |
| CN103920458A (en) | Preparation method for water body eutrophication treatment rare earth composite material | |
| CN107162139B (en) | Flocculant for synchronously removing ammonia nitrogen and phosphorus and preparation method and application thereof | |
| CN108889267B (en) | Method for removing phosphorus in water by using modified waste red bricks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |